220038997 has 4 divisors (see below), whose sum is σ = 221718816. Its totient is φ = 218359180.

The previous prime is 220038991. The next prime is 220039013. The reversal of 220038997 is 799830022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220038997 - 2³ = 220038989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220038991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 839713 + ... + 839974.

It is an arithmetic number, because the mean of its divisors is an integer number (55429704).

Almost surely, 2^220038997 is an apocalyptic number.

It is an amenable number.

220038997 is a deficient number, since it is larger than the sum of its proper divisors (1679819).

220038997 is a wasteful number, since it uses less digits than its factorization.

220038997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679818.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 220038997 is about 14833.7115045426. The cubic root of 220038997 is about 603.7167408918.

The spelling of 220038997 in words is "two hundred twenty million, thirty-eight thousand, nine hundred ninety-seven".